RU210167U1 - SHAFT (ROTOR) OF WAVEGUIDE MICROWAVE SWITCH - Google Patents

Abstract

The utility model relates to microwave technology, in particular to the design of the shaft (rotor) of electromechanical waveguide microwave switches. The technical result of the proposed design is to improve the electrical parameters and performance characteristics of the waveguide microwave switch. The technical result is achieved by the fact that the shaft (rotor), realizing the rotation by 90°, has the shape of a cylinder with two cutouts forming waveguide channels (1) between the walls of the housing and the shaft. On each side of the waveguide channel of the shaft, recesses (2) are made, having a rectangular shape with radius rounded corners, the recesses of the waveguide channel of the shaft (2) serve to match the wave impedances of the waveguide path. Between two waveguide channels, along the side surface of the shaft (rotor) parallel to its axis, there are two symmetrical grooves (3), which have the greatest depth relative to other cutouts. The grooves between the waveguide channels (3) serve to prevent the flow of energy along the side surface of the shaft, which increases the level of decoupling between the channels. On the side face of the shaft (rotor), perpendicular to its axis, there are three cutouts (4) designed to remove bulk resonances, as well as reduce the level of energy flow from the working channel of the waveguide into the grooves between the waveguide channels. On the upper and lower end faces of the shaft, six shallow cuts (5) are made symmetrically to each other relative to the axis of the groove between the waveguide channels, and radial recesses (6). The cutouts on the upper and lower end faces of the shaft (5) serve to destabilize the possible volume resonance on the radial recesses (6).

Description

The utility model relates to microwave technology, in particular to the design of the rotor shaft of electromechanical waveguide microwave switches.

Known waveguide switch, made in the form of a stator with input and output waveguide channels and a rotor, the waveguide channel which has a bend. The bending angle ensures the connection of the input waveguide channel to one of the output waveguide channels [Harvey A.F. Technique of microwave frequencies: v. 1 / A.F. Harvey: per. from English. ed. IN AND. Sushkevich. - M.: Sov. radio, 1965, p. 187, fig. 3.30 b].

The disadvantages of this design are a rather narrow matching frequency band, a decrease in electrical strength, and a significant increase in the diameter of the rotor and the switch as a whole, if it is necessary to introduce a second waveguide channel into the rotor.

Also known is the design of the switch, in the rotor of which two circular waveguides intersecting at an angle of 90° are used, a reflective plate is placed in the plane of their intersection. Choke and cylindrical grooves are cut at the junction of the rotor and stator waveguides, which leads to a decrease in working attenuation, an increase in decoupling, and a decrease in the voltage standing wave ratio [USSR Author's certificate No. 204398].

The disadvantage of this design is the high complexity of manufacturing.

A waveguide switch is known, the rotor of which consists of two parts located symmetrically about its axis and connected by springs, each part of the rotor is installed with the possibility of being compressed to the stator by means of a locking mechanism consisting of three cams placed between the parts of the rotor [USSR author's certificate No. 1282243] .

The disadvantages of this invention are low speed, large dimensions and low reliability due to the complexity of the design of the switch rotor.

A switch (RF patent No. 2022416) containing a concentrically located stator and rotor, in which waveguide channels are made, the narrow walls of which lie in a plane perpendicular to the axis of rotation of the rotor. The waveguide channels are made in the form of ridge waveguides, the stator and rotor are made with a stepwise change in diameter in a plane passing through the middle of the wide walls of the waveguides, and the step length is equal to a quarter of the wavelength at the average frequency of the operating range, and the gap between the cylindrical surfaces of the stator and rotor is constant. The advantage of this design is the reduction of losses and the standing wave ratio of the switch voltage, however, this invention does not solve the problem of eliminating resonances in the system.

Also known is the design of the waveguide switch [RF patent No. 2374723], which contains a stator with input and output waveguide channels. The longitudinal axes of the waveguide channels are rotated relative to each other. In addition, the switch includes a rotor with curved waveguide channels connecting the stator input waveguide to one of the stator output waveguides. Moreover, the waveguide channel of the rotor is made in the form of "n" series-connected straight sections of the waveguide, the longitudinal axes of which are rotated relative to each other by an angle β=α/n+1, and the length of the midline of each of the straight sections of the waveguides in the rotor is equal to λ _B /4, where λ _B is the wavelength in the waveguide; α is the angle between the longitudinal axes of the input and output waveguide channels of the switch stator; n is the number of series-connected straight sections of the waveguide in the rotor; β is the angle between the longitudinal axes of the straight sections of the waveguides in the rotor.

The advantage of this design is the expansion of the frequency band and the minimization of the dimensions of the switch if it is necessary to introduce a second or more channels in the rotor. However, this design has low reliability.

The closest analogue of the proposed utility model is the rotor design of the waveguide switch, which includes a square stator with four ports and a tightly fitting rotor, which can be two- or three-channel. The number of rotor channels determines the number of possible switch positions. With a two-channel rotor, only two positions are possible, and the rotor moves discretely with a step of 90 ° [Kochemasov V. Electromechanical RF / microwave signal switches - main types and manufacturers. Part 3 // ELECTRONICS. Science / Technology / Business. - 2016. - No. 9 (00159). - S. 128-134.].

All the designs described above do not take into account the occurrence of resonances in the stator-rotor system and the matching of wave impedances, and also do not allow increasing the decoupling between the channels and the reliability of the microwave switch to the required level.

The objective of the proposed utility model is to increase the level of decoupling between the waveguide channels, eliminate volumetric resonances on the edges of the rotor shaft, reduce the level of energy losses, and also match the wave resistance of the waveguide path.

The technical result of the proposed design is to improve the electrical parameters and performance characteristics of the waveguide microwave switch.

The technical result is achieved by the fact that the rotor shaft, realizing the rotation by 90°, has the shape of a cylinder with two cutouts forming waveguide channels between the walls of the housing and the rotor shaft. On each side of the waveguide channel of the rotor shaft, recesses are made having a rectangular shape with radius rounded corners, the recesses of the waveguide channel serve to match the wave impedances of the waveguide path. Between the two waveguide channels, along the side surface of the rotor shaft, two symmetrical grooves are located parallel to its axis, having the greatest depth relative to other cutouts. The grooves between the waveguide channels serve to prevent energy from flowing along the side surface of the rotor shaft, which increases the level of decoupling between the channels. On the side face of the rotor shaft, perpendicular to its axis, there are three cutouts designed to remove volumetric resonances, as well as reduce the level of energy flow from the working channel of the waveguide into the grooves between the waveguide channels. On the upper and lower end faces of the rotor shaft, six shallow cuts are made, located symmetrically to each other relative to the axis of the groove between the waveguide channels, and radial recesses. The cutouts on the upper and lower end faces of the rotor shaft serve to destabilize the possible volumetric resonance at the radial recesses.

The proposed utility model is illustrated with the help of drawings. In FIG. 1 shows a general view of the proposed design of the rotor shaft of the waveguide microwave switch, Fig. 2 is a cross section of the rotor shaft of a waveguide microwave switch (section A-A in Fig. 1). Positions in the drawings are indicated

1 - cutouts forming waveguide channels between the walls of the housing and the rotor shaft;

2 - recesses of the waveguide channel of the rotor shaft;

3 - grooves between the waveguide channels;

4 - cutouts on the side face of the rotor shaft;

5 - cutouts on the upper and lower end faces of the rotor shaft;

6 - radius recess.

Information sources

1. Harvey A.F. Microwave technique: v.1 / A.F. Harvey: per. from English. ed. IN AND. Sushkevich. - M.: Sov. radio, 1965, 775 p.

2. Author's certificate of the USSR No. 204398, IPC: H01R 1/12, publ. 1967

3. Author's certificate of the USSR No. 1282243, IPC: H01R 1/12, publ. 1987

4. RF patent No. 2022416, IPC: H01R 1 /12, publ. 10/30/1994.

5. RF patent No. 2374723, IPC: H01R 1/12, publ. 11/27/2009.

6. Kochemasov V. Electromechanical switches of RF / microwave signals - main types and manufacturers. Part 3 // ELECTRONICS. Science/Technology/Business. - 2016. - No. 9 (00159). - S. 128-134.

Claims (1)

The rotor shaft of the waveguide microwave switch, which implements a 90° rotation, having the shape of a cylinder with two waveguide channels, characterized in that the waveguide channels are formed by two cutouts between the walls of the housing and the rotor shaft; on each side of the waveguide channel of the rotor shaft there are recesses having a rectangular shape with rounded radius corners; between two waveguide channels, along the side surface of the rotor shaft parallel to its axis, two symmetrical grooves are made, having the greatest depth relative to other cutouts; on the side face of the rotor shaft, there are three cutouts perpendicular to its axis; on the upper and lower end faces of the rotor shaft, six shallow cuts are made, located symmetrically to each other relative to the axis of the groove between the waveguide channels, and radial recesses.

Images